To worry about the fact that a lot of games were released on the DS only in Japanese, you need to finish all the good games in English first. I must have played over a hundred, some of them two or three times, and they're not short games, but something like Zelda (2 games + 2 spin-offs, yay) or Castlevania (three games), but the DS is still on the table because I play something now and then (Megaman ZX Advent bakes my ass right now). And after that, there are several dozen high-quality fan translations from Japanese to English. And only then anyone can start to suffer that some game was not translated.